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• Import and use ffmpeg in an iOS project [on hold]

  12 février 2014, par Hadi M.NourAllah

  What I am trying to achieve is to play a wmv stream and local wmv files using ffmpeg.

  How can I import and use ffmpeg in my iOS development project ?

  
  how to play local and streaming sound like wmv using ffmpeg

  is there source code or something ???

  i have ffmpeg and i compiled it now i don't how to use it into my ios project

• Is the output ts file size when using ffmpeg convert rtmp to hls with adaptive bitrate too large ?

  21 juillet 2022, par bui the vuong

  I want to convert rtmp to hls that supports adaptive bitrate , when referencing in many sources I use this configuration , but I found the ts file size of 240 to 720 bitrates is larger than I thought , I thought src will have to be the maximum size or 720p , please explain to me why , and is it possible to reduce the file size ( does any option in ffmpeg increase it ) ? Thanks everyone.

  


  My ffmpeg command :

  


  ffmpeg -i rtmp://localhost:1935/$app/$name -async 1 -vsync -1
                    -c:v libx264 -c:a aac -b:v 256k -b:a 64k -g 2 -vf "scale=426:trunc(ow/a/2)*2" -tune zerolatency -preset ultrafast -crf 23 -f flv rtmp://localhost:1935/show/$name_240
                    -c:v libx264 -c:a aac -b:v 768k -b:a 128k -g 2 -vf "scale=720:trunc(ow/a/2)*2" -tune zerolatency -preset ultrafast -crf 23 -f flv rtmp://localhost:1935/show/$name_360
                    -c:v libx264 -c:a aac -b:v 1024k -b:a 128k -g 2 -vf "scale=960:trunc(ow/a/2)*2" -tune zerolatency -preset ultrafast -crf 23 -f flv rtmp://localhost:1935/show/$name_480
                    -c:v libx264 -c:a aac -b:v 1920k -b:a 128k -g 2 -vf "scale=1280:trunc(ow/a/2)*2" -tune zerolatency -preset ultrafast -crf 23 -f flv rtmp://localhost:1935/show/$name_720
                    -c copy -f flv rtmp://localhost:1935/show/$name_src;


  


• How to compile ffmpeg on Windows 10 ?

  13 février 2018, par Mr.Han

  My development environment is Windows 10 - 64bit. It is set to Android development environment. I am trying to compile ffmpeg.

  I installed cygwin and installed cygwin. gcc related all, dos2unix, make, automake. ffmpeg version is 3-2.10.

  Configure file

  Before

  SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
  
  LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
  
  SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
  
  SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'

  After

  SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
  
  LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
  
  SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
  
  SLIB_INSTALL_LINKS='$(SLIBNAME)'

  build_android.sh

  #!/bin/bash
  
  NDK=c:/Users/storm/AppData/Local/Android/Sdk/ndk-bundle
  
  SYSROOT=$NDK/platforms/android-16/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64
  
  CUR=`cygpath -m $(pwd)`
  
  TEMPDIR=`cygpath -m /tmp`
  
  TMP=`cygpath -m /tmp`
  
  function build_one
  
  {
  
  sed -i 's/ln_s="ln -s -f"/ln_s="cp -f"/g' ./configure
  
  ./configure \
  
  --prefix=$PREFIX \
  
  --enable-shared \
  
  --disable-static \
  
  --disable-doc \
  
  --disable-ffmpeg \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-ffserver \
  
  --disable-avdevice \
  
  --disable-doc\
  
  --disable-symver \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --target-os=linux \
  
  --arch=arm \
  
  --enable-cross-compile \
  
  --sysroot=$SYSROOT \
  
  --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
  --extra-ldflags="$ADDI_LDFLAGS"\
  
  $ADDITIONAL_CONFIGURE_FLAG
  
  sed -i':a;N;$!ba;s/gcc 4.9\r/gcc 4.9/g' ./config.h
  
  sed -i':a;N;$!ba;s/gcc 4.9\r/gcc 4.9/g' ./config.mak
  
  #make clean
  
  #make
  
  #make install
  
  }
  
  CPU=arm
  
  PREFIX=$CUR/android/$CPU
  
  ADDI_CFLAGS="-marm"
  
  build_one

  Where is the problem ?